A locking and unlocking mechanism for a circuit breaker

Abstract

The invention discloses a locking and unlocking mechanism of a circuit breaker, which relates to the field of circuit breakers, and comprises a button, a wiring frame and a protective plate, wherein the protective plate cover is mounted on the wiring frame, the button is located directly above the protective plate and the wiring frame, a switch assembly is arranged between the protective plate and the button, the switch assembly can be vertically moved and penetrated in the protective plate, the switch assembly has a first state in which the button is in an unopened state and the top contact with the protective plate is matched, and the lower end of the switch assembly is exposed outside the protective plate so that the circuit breaker cannot be disassembled, and a second state in which the upper end of the switch assembly is inserted into the button and the lower end of the switch assembly is retracted into the protective plate so that the circuit breaker can be disassembled when the button is in an opened state. The invention has the advantages of reliable assembly and stable operation.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a locking and unlocking mechanism of a circuit breaker. Background Art

[0002] As a switch that can provide various protection functions, the circuit breaker can effectively improve the safety and reliability of electrical equipment and power lines. In order to meet the increasingly diverse needs of users, the diversification and miniaturization of circuit breakers is a trend; the existing circuit breakers can be directly connected when they are not disconnected and not installed in place, which is not conducive to the reliable and stable operation of the circuit breaker and also poses a safety hazard; the existing circuit breakers, after being installed in place, have the risk of being accidentally pulled out in the power-on state, which is not conducive to the reliable operation of the circuit breaker and electrical equipment, and also poses a safety hazard. Summary of the invention

[0003] In order to overcome the shortcomings of the background art, the present invention provides a locking and unlocking mechanism for a circuit breaker that can be assembled reliably and work stably.

[0004] The technical solution adopted by the present invention is: a locking and unlocking mechanism of a circuit breaker, which includes a button, a wiring frame and a protective plate, the protective plate cover is installed on the wiring frame, the button is located directly above the protective plate and the wiring frame, a switch assembly is provided between the protective plate and the button, the switch assembly can be vertically moved and penetrated in the protective plate, the switch assembly has a first state in which the button is in an unopened state and is in contact with the protective plate and its lower end is exposed outside the protective plate, so that the circuit breaker cannot be disassembled, and a second state in which the upper end of the button is inserted into the button and the lower end is retracted into the protective plate when the button is in an opened state, so that the circuit breaker can be disassembled.

[0005] The switch assembly includes a latch, a supporting boss is provided in the middle of the protective plate, the supporting boss is provided with a through hole which is vertically arranged and passes through from top to bottom, the latch is passed through the through hole, and a slot corresponding to the latch is provided on the lower end surface of the button.

[0006] The switch assembly also includes an elastic member, the latch is provided with a first baffle bent to one side, the protective plate is hollowed out at a position below the supporting boss, the wiring frame is provided with a mounting platform located directly below the supporting boss, and both ends of the elastic member are respectively installed in contact with the mounting platform and the first baffle.

[0007] The supporting boss is provided with a limiting groove for the first baffle to move up and down and surrounding the elastic member, and the limiting groove is communicated with the through hole.

[0008] The latch is provided with a second baffle plate which is bent toward the other side and is used for manual operation.

[0009] An elastic plate is arranged on the front of the supporting boss, and a shifting boss in contact with the lower end of the elastic plate extends from the front of the latch.

[0010] The back of the protection plate is provided with a plurality of pins, and the wiring frame is provided with a plurality of mounting grooves corresponding to the pins.

[0011] The upper and lower end surfaces of the latch are respectively provided with plug-in ports.

[0012] The first baffle, the second baffle, the plug port and the plug are integrally formed.

[0013] The elastic plate is hook-shaped, and a chamfer is arranged on the surface where the lower end of the elastic plate contacts the gear boss.

[0014] The beneficial effects of the present invention are as follows: the technical solution ensures reliable assembly and stable operation of the small circuit breaker through the limit cooperation between the switch assembly and the housing of the circuit breaker, and prevents the circuit breaker from being pulled out after being assembled in place; when the circuit breaker is not opened, the switch assembly and the protective plate contact each other to prevent the circuit breaker from being installed in place, which is conducive to further improving the reliable assembly and stable operation of the small circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view of the locking and unlocking mechanism of the circuit breaker according to the embodiment of the present invention.

[0016] Figure 2 The front view of the locking and unlocking mechanism of the circuit breaker.

[0017] Figure 3 A front view of the latch and slot mating in the locking and unlocking mechanism of a circuit breaker.

[0018] Figure 4 A schematic diagram of the button structure.

[0019] Figure 5 It is a schematic diagram of the structure of the protective plate.

[0020] Figure 6 A schematic diagram of the structure of the latch.

[0021] Figure 7 A schematic diagram of the wiring frame.

[0022] Figure 8 This is the main view of the button without the latch inserted.

[0023] Fig. 9 Side view of the latch without the latch inserted into the button. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0025] As shown in the figure, a locking and unlocking mechanism of a circuit breaker comprises a button 1, a wiring frame 2 and a protective plate 3, wherein the protective plate 3 is covered on the wiring frame 2, the button 1 is located directly above the protective plate 3 and the wiring frame 2, a switch assembly is provided between the protective plate 3 and the button 1, and the switch assembly can be vertically moved and penetrated in the protective plate 3, the switch assembly has a first state in which the button 1 is in an unopened state and contacts with the protective plate 3 and its lower end is exposed outside the protective plate 3 so that the circuit breaker cannot be disassembled, and a second state in which the upper end of the button 1 is inserted into the button 1 and its lower end is retracted into the protective plate 3 so that the circuit breaker can be disassembled when the button 1 is in an opened state; the technical solution ensures reliable assembly and stable operation of the miniature circuit breaker through the limit position cooperation between the switch assembly and the housing of the circuit breaker, and prevents the circuit breaker from being pulled out after being assembled in place; in the unopened state of the circuit breaker, the switch assembly contacts with the protective plate to prevent the circuit breaker from being installed in place, which is conducive to further improving the reliable assembly and stable operation of the miniature circuit breaker.

[0026] The switch assembly includes a latch 4, a supporting boss 31 is provided in the middle of the protective plate 3, the supporting boss 31 is provided with a through hole 32 which is vertically arranged and passes through from top to bottom, the latch 4 is inserted in the through hole 32, the lower end surface of the button 1 is provided with a slot 11 corresponding to the latch 4, the latch can be moved up and down by force, can be inserted into the slot of the button upward, and can be inserted into the socket of the cabinet downward (not shown), when the circuit breaker is to be disassembled, it can be achieved by operating the latch, if when the circuit breaker is in the unopened state, the slot is not directly above the latch, so when the latch moves upward, the stop boss of the latch and the elastic plate of the protective plate form a top contact fit, the elastic plate 34 is hook-shaped, and the elastic The surface where the lower end of the plate 34 contacts the shift boss 43 is chamfered. When a person manually operates the elastic plate to disengage it from the shift boss, when the upper end of the latch is blocked by the button and cannot move upward, the elasticity of the elastic plate itself will always have an elastic force tending to the shift boss, and then the guiding effect of the chamfered inclined surface will cause the elastic plate to return to the top of the shift boss and re-constitute the top contact fit, so that the lower end of the latch cannot be separated from the socket of the circuit breaker housing, and the circuit breaker cannot be removed; if the button is in the open state, the slot is directly above the latch, the latch moves upward and is inserted into the slot to limit the button, and the lower end of the latch leaves the socket of the cabinet. At this time, the circuit breaker cannot be closed and can be removed from the cabinet.

[0027] The upper and lower end surfaces of the latch pin 4 are respectively provided with plug-in ports 44 .

[0028] The switch assembly also includes an elastic member 5, the latch 4 is provided with a first baffle 41 bent to one side, the protective plate 3 is hollowed out at a position below the supporting boss 31, the wiring frame 2 is provided with a mounting platform 21 located directly below the supporting boss 31, and both ends of the elastic member 5 are respectively installed in contact with the mounting platform 21 and the first baffle 41, and the elastic member 5 is a spring, which is in contact between the mounting platform and the first baffle to provide a pre-tightening force for the latch to move upward.

[0029] The supporting boss 31 is provided with a limiting groove 33 for the first baffle 41 to move up and down and surrounds the elastic member 5, and the limiting groove 33 is connected to the through hole 32; the limiting groove provides a guide for the movement of the latch and can also ensure the stable movement of the spring in the limiting groove to prevent the accidental detachment from occurring.

[0030] The latch 4 is provided with a second baffle plate 42 bent to the other side and used for manual operation; an elastic plate 34 is provided on the front of the support boss 31, and a shift boss 43 in contact with the lower end of the elastic plate 34 extends from the front of the latch 4; the second baffle plate is used for manual operation to place a finger on the second baffle plate and press downward, so that the plug port at the upper end of the latch overcomes the preload force of the spring and leaves the button slot, and a limiting effect is formed between the elastic plate and the shift boss, which overcomes the upward preload force provided by the spring, so that the latch can be opened without manual operation. In the case of keeping the lower end plug-in port inserted in the socket of the cabinet, the elastic plate 34 is hook-shaped, and the surface of the lower end of the elastic plate 34 in contact with the gear boss 43 is chamfered. When the circuit breaker is not opened, when a person manually operates the elastic plate to disengage it from the gear boss, when the upper end of the latch is blocked by the button and cannot move upward, the elasticity of the elastic plate itself will always have an elastic force tending to the gear boss, and then the guiding effect of the chamfered inclined surface will make the elastic plate return to the top of the gear boss and re-constitute the top contact fit.

[0031] The back of the protection plate 3 is provided with a plurality of pins 35, and the wiring frame 2 is provided with a plurality of mounting grooves 22 corresponding to the pins 35. The pins are inserted into the mounting grooves, and several of the pins are provided with barbs to prevent them from falling off, and the installation effect is good.

[0032] The first baffle 41, the second baffle 42 and the plug port 44 are integrally formed with the plug pin 4. In this embodiment, the first baffle and the second baffle are respectively as shown in FIG. Figure 6 As shown, the pin is bent in two opposite directions respectively. The entire pin only needs to be formed once by stamping and then bent, which is convenient for production.

[0033] The working principle of this embodiment is as follows: after the circuit breaker is pushed into the cabinet and in place, the second baffle plate on the latch is pushed downward, and the stop boss of the latch is stuck on the elastic plate of the protective plate; when the circuit breaker is to be disassembled, the elastic plate of the protective plate is first pushed to the right to unlock the stop boss of the latch; if the button is not opened at this time, the latch is supported by the button and cannot move upward, and the circuit breaker cannot be disassembled; if the button is opened, the latch can move upward under the action of the spring, the latch passes through the through hole of the protective plate, and the plug port at the upper end of the latch is inserted into the slot of the button, so that the button is limited and the circuit breaker cannot be closed. At this time, the circuit breaker can be pulled out of the cabinet.

[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] Technical personnel should note that although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A locking and unlocking mechanism for a circuit breaker, characterized in that: It comprises a button (1), a wiring frame (2) and a protective plate (3), wherein the protective plate (3) is mounted on the wiring frame (2), the button (1) is located directly above the protective plate (3) and the wiring frame (2), a switch assembly is provided between the protective plate (3) and the button (1), the switch assembly is vertically movable and penetrates the protective plate (3), and the switch assembly has a first state in which the button (1) contacts the protective plate (3) when the button (1) is in an unopened state and the lower end of the switch assembly is exposed outside the protective plate (3), so that the circuit breaker cannot be disassembled, and a second state in which the upper end of the button (1) is inserted into the button (1) when the button (1) is in an opened state and the lower end of the switch assembly is retracted into the protective plate (3), so that the circuit breaker can be disassembled. The switch assembly comprises a latch (4), a supporting boss (31) is provided in the middle of the protective plate (3), the supporting boss (31) is provided with a through hole (32) which is arranged vertically and passes through the through hole (32), the latch (4) is inserted into the through hole (32), and a slot (11) corresponding to the latch (4) is provided on the lower end surface of the button (1).

2. The locking and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: The switch assembly further comprises an elastic member (5), the latch (4) is provided with a first baffle (41) bent to one side, the protective plate (3) is hollowed out at a position below the supporting boss (31), the wiring frame (2) is provided with a mounting platform (21) located directly below the supporting boss (31), and two ends of the elastic member (5) are respectively mounted in contact with the mounting platform (21) and the first baffle (41).

3. The locking and unlocking mechanism of the circuit breaker according to claim 2, characterized in that: The supporting boss (31) is provided with a limiting groove (33) for the first baffle (41) to move up and down and surrounding the elastic member (5), and the limiting groove (33) is communicated with the through hole (32).

4. The locking and unlocking mechanism of the circuit breaker according to claim 2, characterized in that: The latch (4) is provided with a second baffle (42) bent towards the other side and used for manual operation.

5. The locking and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: An elastic plate (34) is provided on the front side of the supporting boss (31), and a shifting boss (43) that contacts the lower end of the elastic plate (34) extends from the front side of the latch pin (4).

6. The locking and unlocking mechanism of the circuit breaker according to claim 1, characterized in that: The back of the protection plate (3) is provided with a plurality of plug pins (35), and the wiring frame (2) is provided with a plurality of mounting slots (22) corresponding to the plug pins (35).

7. The locking and unlocking mechanism of the circuit breaker according to claim 4, characterized in that: The upper and lower end surfaces of the latch pin (4) are respectively provided with plugging ports (44).

8. The locking and unlocking mechanism of the circuit breaker according to claim 7, characterized in that: The first baffle plate (41), the second baffle plate (42) and the plug port (44) are integrally formed with the plug pin (4).

9. The locking and unlocking mechanism of the circuit breaker according to claim 5, characterized in that: The elastic plate (34) is hook-shaped, and a chamfer is provided on the surface where the lower end of the elastic plate (34) contacts the shifting boss (43).

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